CN107487535A - Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping - Google Patents
Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping Download PDFInfo
- Publication number
- CN107487535A CN107487535A CN201710539338.8A CN201710539338A CN107487535A CN 107487535 A CN107487535 A CN 107487535A CN 201710539338 A CN201710539338 A CN 201710539338A CN 107487535 A CN107487535 A CN 107487535A
- Authority
- CN
- China
- Prior art keywords
- fresh
- films
- film
- function
- keeping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/34—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for fruit, e.g. apples, oranges or tomatoes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
Abstract
Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping, belongs to function and integrates fresh-keeping packaging bag technical field.Splice including at least two films：A films are high moisture-inhibiting function film and E films are high oxygen flow, high carbon dioxide function film thoroughly, and the area ratio of A films and E films is (50 96.3)：(3.7 50), wherein area ratio are 100% calculating by A film+E membrane areas.The present invention solves the problems, such as fogging on the inside of freshness protection package, is particularly suitable for the fresh-keeping packaging design of transition fruits and vegetables under normal temperature.
Description
Technical field
The invention belongs to function to integrate fresh-keeping packaging bag technical field, more particularly to a kind of work(fresh-keeping suitable for intensive shadow on lung
Can integrated fresh-keeping packaging bag.
Background technology
Intensive shadow on lung (Chinese Cabbage) is a mutation of Cruciferae Brassica genus Vegetable Crops of Brassica Chinese cabbage subspecies, also known as
Green vegetables, pakchoi etc., cultivation history is long in China and world wide, and plantation region is wide, and because cultivation period is short, suitable
The characteristics of Ying Xingqiang, high nutritive value, turn into one of most important vegetables on dining table.Intensive shadow on lung has that leaf surface product is big, contains
The features such as water is high, tissue is tender and crisp, chlorisis yellow easily occurs after harvesting, dehydration is wilted and gone mouldy the problems such as rotten, normal temperature goods
The frame phase is short, it is easy to loses edibility, therefore the fresh-keeping difficulty of intensive shadow on lung is larger.How the respiratory intensity of intensive shadow on lung is reduced,
Convey appropriate oxygen to breathe for intensive shadow on lung, the carbon dioxide and moisture that the breathing of discharge intensive shadow on lung generates in time are realized fresh-keeping
It is crucial.Preservation by low temperature is the preservation method and maximally effective preservation method being most widely used in agricultural product accumulating, and storage is warm
Degree is lower, and the respiratory rate of fruits and vegetables is slower, and its moisture loss, nutrient loss are slower.Methyl cyclopropene processing can suppress
Respiration, ethylene concentration caused by breathing being reduced, reduce Vc, titratable acid, soluble solid, chlorophyll content lose,
It is obvious to reduce hardness reduction effect, there is more preferable outward appearance, flavor, there is more obvious fresh-keeping effect.Intensive shadow on lung band root low temperature
Refrigeration (0 DEG C, humidity >=90%) is fresh-keeping, can extend intensive shadow on lung storage period to 42 days, almost conventional without the root storing and fresh-keeping phase
2 times.In freshness protection package add antiseptic be also extend rape shelf life means, in LDPE resin add OBPA (10,
The double phenoxazine arsenic of 10'- oxos, 10,10'oxybis-phenoxarsine) preservative film obtained, intensive shadow on lung is stored under the conditions of 8 DEG C
Found after 12 days, OBPA can substantially reduce the xanthate ratio of intensive shadow on lung.Propylparaben is added in polyethylene to prepare
Freshness protection package there is obvious anti-mold effect, can effectively keep intensive shadow on lung quality, slow down the loss of intensive shadow on lung nutriment.
Controlled atmospheric packing MAP is the fresh-keeping most efficient method of current rape.Active controlled atmospheric packing with 100%CO2 is significant
Reduce the content of total mesophilic microorganism on intensive shadow on lung.Carla Barbosa have also discovered the optimal preservation condition of intensive shadow on lung
For 0%O2+ 40%CO2, compared with the business preservation condition used at present, its shelf life extension nearly 12 days, in storing process
In, CO in MAP2Increase, reduce total aerobic bacteria and Escherichia coli.Passive controlled atmospheric packing is by changing the saturating of freshness protection package
Gas, using vegetables breathe caused by metabolite a suitable oxygen, carbon dioxide and relatively wet are formed in freshness protection package
(RH) environment is spent, to extend by freshness-retaining vegetable shelf life.Compared with active controlled atmospheric packing, passive controlled atmospheric packing cost is relatively low, only
A freshness protection package can is needed to realize.Yoshio Makino propose to utilize chitosan -- the lamination of cellulose and polycaprolactone
Material packs the film of (MAP) as the modified atmospheres of fresh intensive shadow on lung, and being used for different vegetable has gas with various infiltration system
Several laminated material, to realize that the gas component in each packaging of packaging fresh product is close to optimal gas group
Point.Change the gas permeability of polyethylene film using molecular sieve, can be formed using it as freshness protection package prepared by material film in bag
One relatively low oxygen concentration (compared with air atmosphere), the controlled atmosphere atmosphere of relatively low gas concentration lwevel, normal temperature under this atmosphere
Lower intensive shadow on lung shelf life was up to 3 days, and the freshness date of intensive shadow on lung was up to 13 days under 6 DEG C of refrigeration, but the penetrability of the freshness protection package
It is poor, there is water smoke appearance in film surface.Guo Yuhua etc. is prepared for the polyethylene film that calcium carbonate content is 40%, its rate of perviousness
For 19g/ (m2.day), oxygen transmission rate is more than 10000ml/ (m2.atm.day), manufactured MAP still can not appear intensive shadow on lung completely
Steam caused by breathing.In order to improve the penetrability of polyethylene film, or even the perforate (diameter on polyethylene freshness protection package
0.82mm), condensation in bag is prevented, but these micropores can also allow oxygen to enter, and increase the respiratory intensity of intensive shadow on lung, and generation water increases
Add, it is impossible to the basic condensation problem for solving freshness protection package.
In summary, intensive shadow on lung is fresh-keeping uses polyethylene (PE) freshness protection package more, and PE freshness protection packages have higher oxygen flow ability,
The oxygen flow of the PE films of the microns of thickness 10 can reach tens of thousands of ml/ (m2.atm.day), can meet completely in freshness protection package
The demand of intensive shadow on lung aerobic respiration, but the penetrability of this film is very low, generally less than 20g/ (m2.day), it is impossible to rapidly from
Moisture caused by intensive shadow on lung breathing is removed in freshness protection package, causes Water accumulation, more than 100%, film surface condensation occurs and showed RH
As the environment of this high humility substantially increases the growth speed of bacterium, causes intensive shadow on lung wound to rot, although PE preservative films
Intensive shadow on lung water loss can be effectively prevented, but also brings the problem of rotten.With appropriate oxygen flow and efficiently permeable function
Film can solve the fresh-keeping problem of intensive shadow on lung.
The content of the invention
In order to fundamentally solve freshness protection package condensation problem, the present invention proposes to utilize the integrated method solution of 2 kinds of function films
Certainly this problem, using a kind of our homemade high oxygen flow function film E and high moisture-inhibiting film A, according under intensive shadow on lung normal temperature
Respiratory rate, foundation it is proposed that multifunction integrated design it is theoretical, the area of two kinds of function films of E needed for calculating and A,
The EA function films area calculated than ± 20% in the range of, heat is spliced into the difunctional integrated freshness protection packages of 2 groups of EA, and is put with naked
Group contrast, evaluates fresh-keeping effect of the difunctional integrated freshness protection package to intensive shadow on lung.
A kind of function of the present invention integrates fresh-keeping packaging bag, it is characterised in that splices including at least two films：A films are
High moisture-inhibiting function film and E films are high oxygen flow, high carbon dioxide function film thoroughly, and the area ratio of A films and E films is (50-96.3)：
(3.7-50), wherein area ratio are 100% calculating by A film+E membrane areas.
A films are high moisture-inhibiting function film, and the percent of pass (WVTR) of its vapor is 80g/m2.day, oxygen percent of pass
(OTR) it is 5000ml/m2.day.atm, a kind of PE modified films, the preparation technology reference of film are belonged to
ZL201010532453.0：Diatomite is dispersed in water, vinyl acetate or/and polyacrylic acid monomers is then added, is warming up to
40-60 DEG C, the hydrogen peroxide that concentration is 30% is added, is subsequently added into the ferrous chloride aqueous solution of mass concentration 10%, reaction 4~10
Hour, then dry, crushing obtains modification infusorial earth；Above-mentioned every 100 grams of diatomite is correspondingly dispersed in 500ml water, then
Corresponding to add 5~200ml monomers, the corresponding 0.5~5ml of hydrogen peroxide addition, ferrous chloride aqueous solution is corresponding to add 0.2~2ml.
After being mixed using 90~99.5 parts common of LDPE resin with surface treated 0.5~10 part of diatomite, in 170~180
Melt co-extrusion at DEG C to be granulated, then blowing or biaxial tension method are prepared into highly-breathable film of the present invention.
E films are high oxygen flow, high saturating carbon dioxide function film, and the OTR of film reaches 1.7 × 105ml/m2.day.atm, two
Carbonoxide transmitance (CO2TR it is) 106ml/m2.day.atm, WVTR 9g/m2.day, the function film reference
ZL201210363822.7：With single layer structure, be with low density polyethylene (LDPE) (LDPE), LLDPE (LLDPE),
After one or more in high density polyethylene (HDPE) (HDPE) are matrix resin, with 15-50wt% amorphous polymer melt blendings
Be blow molded the film that forms, amorphous polymer be styrene-butadiene block copolymer (SBS), ethylene propylene diene rubber (EPDM),
Ethylene-octene copolymer (POE), polybutadiene (PB), natural rubber (NR), one kind in ethylene-vinyl acetate (EVA) or
It is several.Toatl proportion of the amorphous polymer in system is typically between 15-50wt%, preferably 25-30%.
The film that the integrated fresh-keeping packaging bag of above-mentioned function can also splice other functions is shown in Fig. 1, such as antibacterial functions film
AT or/and ethene suppressing function film MCP.AT and MCP function films oxygen flow and the equal very little of moisture-inhibiting ability, their OTR exist
2000-5000ml/m2.day.atm in the range of, WVTR is in 5-10g/m2.day.100RH between, AT and MCP functional membranes are to oxygen flow
It with the contribution very little of moisture-inhibiting, can be ignored, therefore when designing multifunctional unit fresh-keeping packaging, only consider that AT's is anti-respectively
The ethene suppressing function of bacterium function and MCP, without regard to them to oxygen flow and the contribution of moisture-inhibiting, what this mentality of designing was set up
Precondition is the OTR of E function films 106ml/m2.day.atm left and right, the WVTR of A function films is in 80g/
m2.day.100RH left and right.
The function of the present invention integrates the preservation that fresh-keeping packaging bag is applied to fruit or vegetables with climacteric, especially suitable
Preservation for rape.
The unique difunctional Integrated design of the fresh-keeping packaging of the present invention, effectively reduces oxygen supply, it is suppressed that rape
Breathing, contained the generation of rape climacteric, slow down the loss of TSS, VC nutritional ingredient and moisture, ensure that outside rape
Quality is seen, the freshness date of rape at normal temperatures is extended to 5 days (A90E10) and 4 days respectively from naked 2 days put under state
(A50E50)；The reasonability of multifunctional unit fresh-keeping packaging design theory is demonstrated by the fresh-keeping evaluation of rape, the design is thorough
Bottom solves the problems, such as fogging on the inside of freshness protection package, is particularly suitable for the fresh-keeping packaging design of transition fruits and vegetables under normal temperature.
Brief description of the drawings
Fig. 1 is that a kind of function of the present invention integrates the structural representation of fresh-keeping packaging bag；
A is high moisture-inhibiting function film；E represents high oxygen flow, high carbon dioxide function film thoroughly；AT is antibacterial functions film；
MCP is sustained release 1- methyl cyclopropenes (ethene suppression) function film；
Fresh-keeping group of head space changes of concentrations of carbon dioxide figure of Fig. 2；
Fig. 3 freshness protection package head space oxygen concentration variation diagrams；
Fig. 4 is by the water loss comparison diagram of fresh-keeping rape；
Fig. 5 rapes TSS changes with time figure；
Fig. 6 rapes VC changes with time figure.
Embodiment
With reference to embodiment, the invention will be further described, but the present invention is not limited to following examples.
In following examples, the test of intensive shadow on lung respiratory intensity
It is V with volume under 25 DEG C of room temperature condition2Milliliter stainless steel metal tank seals M kilograms of intensive shadow on lung (intensive shadow on lung body
Product is V1Milliliter) after 10 minutes, extract headspace gas in tank, with PAC CHECK 450EC (Mocon, Minneapolis, MN,
USA) gas concentration (CO in headspace analysis instrument test tank2% and O2%)；Intensive shadow on lung respiratory rate is under under 25 DEG C of room temperature conditions
Row formula (1) calculates.
The respiratory intensity that we measure the intensive shadow on lung under 25 DEG C of air ambient according to above-mentioned method of testing is 42mlCO2/
kg.hr。
The test of intensive shadow on lung quality
The calculating of weight-loss ratio
Using difference weight method, mass M of the intensive shadow on lung before fresh-keeping is utilized0With it is fresh-keeping after mass M1Difference, according to formula (2) count
Calculate：
Intensive shadow on lung ocular estimate
From the vegetables of Beijing Xinfadi wholesale vegetable market purchase, Sensory Index 10；If 20% dehydration, 2
There is the yellow side less than 10% area in blade, and other blades remain in that dark green, there is fragrant, without rotten, sense organ now
Index is 6, belongs to the quality bottom line of market receiving；According to the outward appearance of intensive shadow on lung, we carry out quality evaluation according to following standard：
The exterior quality evaluation criterion of the intensive shadow on lung of table 1
Rape Analysis of Nutritive Composition
Using homogenizer (Beckman J20-2) by 100 grams of intensive shadow on lung and the mixture of 100 grams of deionized waters 15,
000rpm shears 20min, then obtains the pH value of vegetable juice using PH measurement examinations；Utilize saccharometer (PR-101 α, Japan
Atago Company) test vegetable juice soluble solid content (Brix0)；Titrated in vegetable juice and tieed up using 2.6- dichloroindophenols
The content (mg/100g) of raw plain C (VC).
Intensive shadow on lung is after harvesting, under 2-4 DEG C of air ambient, with the extension of storage time, its respiratory intensity from
12mlCO2The 60ml/kg.hr that/kg.hr was risen to after 6 days, subsequent respiratory intensity gradually reduce, and are to respiratory intensity at 12 days
30ml/kg.hr, understand that intensive shadow on lung belongs to climacteric vegetables from data in literature.The respiratory rate meeting of intensive shadow on lung at normal temperatures
Higher than under cryogenic conditions.By test, under 25 DEG C of air ambient, the respiratory intensity of intensive shadow on lung is 42mlCO under normal temperature2/
kg.hr(82mgCO2/ kg.hr), the oxidation of glucose in intensive shadow on lung body (soluble solid content) can be calculated according to formula (3)
Speed reaches 56mg/kg.hr, consumes the moisture 42mlH of itself in matrix during breathing2O/kg.hr, there is 84mlH2O/kg.hr
(68mgH2O/kg.hr moisture) is discharged to the external world, and every kilogram of intensive shadow on lung releases heat 874J/hr.
C6H12O6+6O2+6H2O→6CO2+12H2O+2808KJ (3)
If packing packed 0.5kg intensive shadow on lung using the PE of in the market, it is necessary to the size of packaging bag is in 20 × 15cm or so,
The gross area of packaging bag is 0.06m2If intensive shadow on lung is maintained normally to breathe, it is necessary to what the PE films for manufacturing packaging bag had
OTR can calculate according to formula (4)：
OTR=42mlCO2/kg.hr×0.5kg×24hr/(0.06m2×(0.2-0)) (4)
The oxygen flow of PE material films is calculated according to formula (4) at least to be needed to reach 42000ml/m2.day.atm, now wrap
The oxygen concentration for packing head space is 0, and anaerobic respiration will not just occur for rape；Under the respiratory intensity, 0.5kg is small in packaging bag
Rape breathing generation moisture 34mgH2O/hr, there is dew condensation phenomenon in packaging bag to not allow, we control relative in packaging bag
Humidity RH is 95% or so, if humidity is 60%, it is necessary to which the WVTR that PE films have should reach under the outer air ambient of packaging bag
The index arrived calculates according to formula (5)：(assuming that summer average environment humidity 60%)
WVTR=68mgH2O/kg.hr×0.5kg×24hr/(0.06m2×(0.95-0.6)×1000) (5)
The WVTR of PE material films is calculated according to formula (5) at least to be needed to reach 39g/m2.day.100RH。
It can be seen from calculating above, under 25 DEG C of normal temperature, using the fresh-keeping intensive shadow on lung of PE films, it is necessary to the OTR of film
=42000ml/m2.day.atm, and its WVTR reaches 39g/m2.day.100RH, but in the market without any a film
The requirement of rape oxygen flow and moisture-inhibiting can be met simultaneously.But we can meet the saturating of this harshness using two kinds of function films
Oxygen and moisture-inhibiting requirement, this fresh-keeping packaging design are referred to as multifunctional unit fresh-keeping packaging design, and high oxygen flow function can be utilized thin
Film is that enough oxygen is supplied in fresh-keeping packaging, and the steam of generation is excluded using high moisture-inhibiting film, if the material film used
Oxygen flow and moisture-inhibiting are very capable, then maintain the area very little of the A and E films needed for vegetables aerobic respiration, thus can be total
Area is 0.06m2Freshness protection package in introduce certain area antibacterial functions film and ethene suppress or ethylene absorption function film.
Fig. 1 is the schematic diagram that a kind of four function integrates fresh-keeping packaging, and the fresh-keeping packaging is except that can meet high respiratory intensity
Outside vegetables oxygen flow and moisture-inhibiting demand, also there is sustained release gas phase antiseptic and 1- methyl cyclopropenes (ethylene inhibitor) function, it is this
Fresh-keeping packaging can maintain quality of vegetable to greatest extent, prevent from rotting, and avoid the generation of condensation problem.
Embodiment 1
Using we develop the fresh-keeping 0.5kg rapes of E, A function film, it is necessary to fresh-keeping packaging with 34mgH2O/hr speed
Discharge the moisture of fruits and vegetables breathing generation, it will be assumed that these moisture provide by A function films (provide hypothesis establishment below completely
The reason for), it is necessary to function film A area (SA) be：
SA=34mgH2O/hr×24hr/(80g/m2.day × (0.95-0.6))=0.026m2 (6)
The aerobic respiration of 0.5kg rapes is maintained, it is necessary to 21mlCO2/ hr speed continues to provide oxygen from the external world, and we are false
If these moisture provide by E function films completely and (provide the reason for hypothesis is set up below), the area (S of E function films is neededB)
For：
SB=21ml O2/hr×24hr/(1.7×105ml/m2.day.atm×
(0.2-0.15))=0.006m2 (7)
In the fresh-keeping packaging head space, we set the oxygen concentration of maintenance 15%.
Function film A mainly provide penetrability, and it is also contributed to oxygen flow, and specific contribution rate is：
0.026m2×5000mlO2/m2.day.atm×(0.2-0.15)/(21mlO2/ hr × 24hr)=1.3% (8)
As can be seen here, in multifunction integrated design, when calculating the oxygen flow ability of fresh-keeping packaging, function film need to only be considered
E, function film A can be ignored to the contribution rate very little (being less than 2%) of oxygen flow；
Function film E mainly provide oxygen permeability, and it is also occasionally contributed moisture-inhibiting, and its contribution rate to moisture-inhibiting is：
0.006m2×9g/m2.day×(0.95-0.6)×1000/(34mgH2O/hr × 24hr)=2.4% (9)
As can be seen here, in multifunction integrated design, when calculating the moisture-inhibiting ability of fresh-keeping packaging, function film need to only be considered
A, function film E can be ignored to the contribution rate very little (being less than 3%) of oxygen flow；
0.026m2Function film A and 0.001m2Function film E, it is possible to meet oxygen flow needed for 0.5kg rapes and thoroughly
Wet demand, remaining 0.033m2(0.06-0.001-0.026) can be used for setting other function films (AT, MCP).AT and MCP
Function film oxygen flow and the equal very little of moisture-inhibiting ability, their OTR is in 2000-5000ml/m2.day.atm in the range of, WVTR is in 5-
10g/m2.day.100RH between, AT and MCP functional membranes can be ignored to oxygen flow and the contribution very little of moisture-inhibiting, therefore
When designing multifunctional unit fresh-keeping packaging, AT antibacterial functions and MCP ethene suppressing function are only considered respectively, without regard to
, to oxygen flow and the contribution of moisture-inhibiting, the precondition that this mentality of designing is set up is the OTR of E function films 10 for they6ml/
m2.day.atm left and right, the WVTR of A function films is in 80g/m2.day.100RH left and right.
The material film gross area is 0.06m2Freshness protection package, fresh-keeping 0.5kg rapes are, it is necessary to the A pellicular fronts of high moisture-inhibiting function
Product is 0.026m2, almost account for the 50% of the gross area.
Embodiment 2
On the basis of embodiment 1, the material film composition for designing wherein a fresh-keeping packaging is：The A films of 50% area+
The E films of 50% area, i.e., by equal area (0.03m2) two panels film (A and E) freshness protection package 1 is made by three bandings, mark
For A50E50；The metabolism of rape has transition property, when transition occurs, its respiratory intensity can be 2 times of usual respiratory intensity with
On；
Consideration 0.006m simultaneously2Function E films+0.054m2It is difunctional integrated fresh-keeping that function A films form another money
Packaging, labeled as A90E10；
The difunctional integrated fresh-keeping 0.5kg rapes of fresh-keeping packaging (bag) of A50E50 and A90E10 two are selected, are tested to rape
Fresh-keeping effect.
(1) in difunctional integrated fresh-keeping packaging headspace gas change
50kg rapes are bought from Beijing Xinfadi wholesale vegetable market, remove pest and disease damage, discoloration, the oil with machinery wound
Dish, will have no mechanical damage, maturity is consistent, the rape of uniform coloring, be 1 sample per 0.5kg, every 5 such Duplicate Samples
Product are one group, and 6 groups are a series, set 3 series, i.e. A90E10 and the fresh-keeping series of A50E50, and a control series altogether.
Rape is loaded into A90E10 and A50E50 freshness protection packages, 1 group (5 parallel samples) was taken out every 0.2,1,2,4,6 day, tests head space
Whether gas component, each fresh-keeping cluster film inner side of observation there is dew condensation phenomenon.
For fresh-keeping group of A50E50, E function film areas take the high of Integrated design E values to limit, and oxygen is sufficient in freshness protection package,
Oxygen concentration is stable between 20.2-20.4%, and air concentration (20.5%) close in external environment, this is integrated with freshness protection package
Imagination during design is consistent, and caused carbon dioxide is also quickly removed outside freshness protection package, carbon dioxide in freshness protection package
Concentration maintains 0.5% or so, and after loading rape 0.2 day (about 5 hours) in freshness protection package, oxygen and gas concentration lwevel are
It is stable, in whole preservation process, there is not climacteric.Vapor caused by rape breathing can the completely occupied gross area
50% A function films exclude, in the inner side of freshness protection package all the time without discovery vapor dew condensation phenomenon, water caused by rape breathing
Steam can remove to the external world completely by A films, consistent with imagination during Integrated design.Fresh-keeping group of head space gas concentration lwevel becomes
Fig. 2 is shown in change, and Fig. 3 is shown in the change of freshness protection package head space oxygen concentration.
It is integrated to set face of the timing setting freshness protection package head space oxygen concentration as 15%, E function films for fresh-keeping group of A90E10
The lowest limit of E values, became from head space oxygen concentration in Fig. 2 and Fig. 3, the freshness protection package after the 1st day when product is in Integrated design
In stabilization, 15.4% or so is maintained always later；Gas concentration lwevel is also the same, is tended towards stability at first day, the 2nd day
1.7% or so is maintained later, illustrates that the respiratory intensity of rape maintains 42mlCO always2/ kg.hr or so, do not occur with
Extend the phenomenon that rape respiratory intensity slowly improves during storage.For fresh-keeping group of A90E10, although E function films only account for it is fresh-keeping
The 10% of the bag gross area, but still enough oxygen fuel feeding dishes can be provided and carry out aerobic respiration, breathe the carbon dioxide of generation
It is also required to be rejected to the external world by E films；Because A function film areas account for the 90% of the freshness protection package gross area, water caused by breathing
Steam can be discharged to the external world completely, and freshness protection package inner side is without generation dew condensation phenomenon, compared with fresh-keeping group of A50E50, A90E10
Fresh-keeping group forms relatively low relative humidity conditions in freshness protection package.
(2) rapeseed quality changes in freshness protection package
Rape after harvesting, continue to maintain metabolic activity, as shown in formula (1), absorb the oxygen in freshness protection package head space
Gas, it is metabolic intermediates using the water in body, the carbohydrate nutritional ingredient in oxidation machine body, discharges more moisture.For naked
Control group is put, at 25 DEG C, the respiratory rate of rape is uncontrolled, and it can be slowly increased, and quickly reaches transition phase, Ran Houxun
Rapid-result ripe aging, the steam of generation can be evaporate into surrounding environment rapidly by the stomata on rape surface, have very high mass transfer
Speed, the water loss speed of rape quickly, water loss 8% at the 1st day, are lost in 18% (Fig. 4) on the 2nd day, wilted serious, goods
The frame phase has arrived.
Fresh-keeping group of A90E10, the area of oxygen flow function E films takes the lower bound of design load, the respiratory rate of rape during Integrated design
Control is in 42mlCO2/ kg.hr, reach after poised state in freshness protection package head space oxygen concentration control in 15.4%, CO2Concentration controls
1.7%, control group and A50E50 groups are put relative to naked, the respiratory rate of rape controls relatively low, this in freshness protection package head space
It the carbon dioxide of low concentration, can play a part of suppressing rape breathing, and carbon dioxide will not be caused to injure rape, therefore should
A90E10 Integrated designs effectively reduce the moisture loss of rape, only lose 1.0% at the 1st day, extend later with fresh keeping time
Moisture loss linearly rises, and during by the 5th day, only loses 10% (Fig. 4), reaches its shelf life (table 2), and now rape keeps blue or green
Green, there is fragrant, rotted without any, it is yellow in (area is less than 10% while yellow) that every rape there are 2 blades to occur.
As seen from Figure 4, the A50E50 groups rape fresh-keeping compared with A90E10 groups has higher moisture loss, is that A90E10 groups are lost
1.5-1.6 times of water, but its rate-of-loss of coolant still puts group significantly lower than naked.Compared with A90E10 groups, A50E50 groups have more
More oxygen flow function films, freshness protection package have higher oxygen supply ability so that rape, which automatically speeds up ageing process, not to be had
To abundant control, therefore rate-of-loss of coolant is higher than A90E10 groups, and 2.0% was lost at the 1st day, extends moisture with fresh keeping time later
Loss is linear to be risen, and during by the 4th day, dehydration 12%, reaches its shelf life；The dehydration of A50E50 group rapes is only control group
Between 1/2~1/4, the rate-of-loss of coolant of rape is controlled well, does not have water smoke generation on the inside of freshness protection package.
1 days more than A50E50 groups of the shelf life that fresh-keeping group of A90E10, we are analyzed except fresh-keeping group of rape of A90E10 has
Outside relatively low respiratory rate, the carbon dioxide of higher concentration is for suppressing the growing of total mesophilic microorganism on intensive shadow on lung, preventing
Only intensive shadow on lung rots have obvious effect.
The change of rape exterior quality in the freshness protection package of table 2
By TSS contents in fresh-keeping rape and VC concentration versus time curve as shown in Figure 5 and Figure 6.It is naked to put what is organized
Rape dehydration is serious, but does not rot, therefore its nutritional ingredient is detected always, due to the rape in the shelf life of 2 days
Dehydration 8-18%, therefore the TSS and V in rape bodyCIt is concentrated, TSS has increased slightly, but VC contents are in the trend reduced；Say
It is bright in the case of naked put, the oxidized speed of sugar and VC in rape body is more fresh-keeping group high, and nutritional ingredient is quickly lost in.
The oxygen permeation membrane ratio of fresh-keeping group of integral packaging of A90E10 is less than A50E50 groups, is transported to from the external world inside fresh-keeping packaging
Oxygen concentration it is low, TSS and VC oxidation rate is small in body, therefore compared with A50E50, slow down the loss of nutritional ingredient.
In the later stage in fresh-keeping cycle, because A50E50 groups percentage of water loss is higher than A90E10 groups, this causes VC to be concentrated, and later stage A50E50 is protected
The fresh group of VC a little higher than A90E10 groups of concentration.
With it is naked put control group compared with, the unique difunctional Integrated design of A90E10 and A50E50 fresh-keeping packagings, effectively subtract
Lacked oxygen supply, it is suppressed that the breathing of rape, contained the generation of rape climacteric, slow down TSS, VC nutritional ingredient and
The loss of moisture, rape exterior quality is ensure that, the freshness date of rape at normal temperatures is extended respectively from naked 2 days put under state
To 5 days (A90E10) and 4 days (A50E50)；Multifunctional unit fresh-keeping packaging design theory is demonstrated by the fresh-keeping evaluation of rape
Reasonability, the design thoroughly solves the problems, such as fogging on the inside of freshness protection package, is particularly suitable for transition fruits and vegetables under normal temperature
Fresh-keeping packaging designs.
Claims (6)
1. a kind of function integrates fresh-keeping packaging bag, it is characterised in that splices including at least two films：A films are high moisture-inhibiting function
Film and E films are high oxygen flow, high carbon dioxide function film thoroughly, and the area ratio of A films and E films is (50-96.3)：(3.7-50),
Wherein area ratio is 100% calculating by A film+E membrane areas.
2. integrate fresh-keeping packaging bag according to a kind of function described in claim 1, it is characterised in that A films are that high moisture-inhibiting function is thin
Film, the percent of pass (WVTR) of its vapor is 80g/m2.day, oxygen percent of pass (OTR) is 5000ml/m2.day.atm, belong to
A kind of PE modified films；E films are high oxygen flow, high saturating carbon dioxide function film, and the OTR of film reaches 1.7 × 105ml/
m2.day.atm, carbon dioxide transmission rate (CO2TR it is) 106ml/m2.day.atm, WVTR 9g/m2.day。
3. integrate fresh-keeping packaging bag according to a kind of function described in claim 1, it is characterised in that A films are that high moisture-inhibiting function is thin
Membrane preparation method；Diatomite is dispersed in water, vinyl acetate or/and polyacrylic acid monomers is then added, is warming up to 40-60
DEG C, the hydrogen peroxide that concentration is 30% is added, the ferrous chloride aqueous solution of mass concentration 10% is subsequently added into, reacts 4~10 hours,
Then dry, crushing obtains modification infusorial earth；Above-mentioned every 100 grams of diatomite is correspondingly dispersed in 500ml water, is then corresponded to and is added
Enter 5~200ml monomers, the corresponding 0.5~5ml of hydrogen peroxide addition, ferrous chloride aqueous solution is corresponding to add 0.2~2ml；Using general
After 90~99.5 parts logical of LDPE resin mixes with surface treated 0.5~10 part of diatomite, melted at 170~180 DEG C
Melt co-extrusion granulation, then blowing or biaxial tension method are prepared into highly-breathable film of the present invention；
E films are high oxygen flow, high carbon dioxide function film thoroughly, have single layer structure, are with low density polyethylene (LDPE) (LDPE), linearly
One or more in low density polyethylene (LDPE) (LLDPE), high density polyethylene (HDPE) (HDPE) are matrix resin, with 15-50wt% without
The film being blow molded after amorphous polymer melt blending, amorphous polymer are styrene-butadiene block copolymer
(SBS), ethylene propylene diene rubber (EPDM), ethylene-octene copolymer (POE), polybutadiene (PB), natural rubber (NR), ethene-
One or more in vinylacetate (EVA)；Toatl proportion of the amorphous polymer in system typically 15-50wt% it
Between.
4. integrate fresh-keeping packaging bag according to a kind of function described in claim 1, it is characterised in that function integrates fresh-keeping packaging bag
The film of other functions, including the film MCP of antibacterial functions film AT or/and ethene suppressing function can also be spliced.
5. the function described in claim any one of 1-4 integrates the application of fresh-keeping packaging bag, for the fruit with climacteric
Or the preservation of vegetables.
6. the function described in claim any one of 1-4 integrates the application of fresh-keeping packaging bag, the preservation for rape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539338.8A CN107487535A (en) | 2017-07-04 | 2017-07-04 | Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539338.8A CN107487535A (en) | 2017-07-04 | 2017-07-04 | Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107487535A true CN107487535A (en) | 2017-12-19 |
Family
ID=60644625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710539338.8A Pending CN107487535A (en) | 2017-07-04 | 2017-07-04 | Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107487535A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314805A (en) * | 2018-01-28 | 2018-07-24 | 朱春英 | Degradable gas phase fruit-vegetable plastic wrap and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333096B1 (en) * | 1999-12-21 | 2001-12-25 | Montell Technology Company Bv | Co-extruded, multilayer packaging film made from propylene polymer material |
| CN201087310Y (en) * | 2007-08-31 | 2008-07-16 | 徐晟� | Laminating paper |
| CN101979432A (en) * | 2010-10-29 | 2011-02-23 | 北京印刷学院 | Fruit fresh-keeping packaging material with high air permeability and preparation method thereof |
| US20120003424A1 (en) * | 2010-06-30 | 2012-01-05 | Paper-Park Industries | Absorbent food pad |
| CN102863685A (en) * | 2012-09-26 | 2013-01-09 | 北京印刷学院 | Fresh-keeping packaging material for tomatoes |
| CN104803078A (en) * | 2015-01-12 | 2015-07-29 | 北京印刷学院 | Multifunctional integrated freshness protection package and preparation method thereof |
-
2017
- 2017-07-04 CN CN201710539338.8A patent/CN107487535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333096B1 (en) * | 1999-12-21 | 2001-12-25 | Montell Technology Company Bv | Co-extruded, multilayer packaging film made from propylene polymer material |
| CN201087310Y (en) * | 2007-08-31 | 2008-07-16 | 徐晟� | Laminating paper |
| US20120003424A1 (en) * | 2010-06-30 | 2012-01-05 | Paper-Park Industries | Absorbent food pad |
| CN101979432A (en) * | 2010-10-29 | 2011-02-23 | 北京印刷学院 | Fruit fresh-keeping packaging material with high air permeability and preparation method thereof |
| CN102863685A (en) * | 2012-09-26 | 2013-01-09 | 北京印刷学院 | Fresh-keeping packaging material for tomatoes |
| CN104803078A (en) * | 2015-01-12 | 2015-07-29 | 北京印刷学院 | Multifunctional integrated freshness protection package and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314805A (en) * | 2018-01-28 | 2018-07-24 | 朱春英 | Degradable gas phase fruit-vegetable plastic wrap and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104262656B (en) | A kind of preparation method of mushroom preservation film | |
| Ares et al. | Modified atmosphere packaging for postharvest storage of mushrooms. A review | |
| Goswami et al. | Advances in polymeric materials for modified atmosphere packaging (MAP) | |
| CN107183158B (en) | Fruit vegetables flowers card that keeps fresh with fresh-keeping function | |
| Chandra et al. | Changes in microbial population and quality of microgreens treated with different sanitizers and packaging films | |
| CN104151691B (en) | Nano preservative film for preventing edible fungus from deterioration and application thereof | |
| Mangaraj et al. | Modified atmosphere packaging of fruits and vegetables for extending shelf-life-A review | |
| CN101642161B (en) | Physical method for preserving freshness of waxberry fruits | |
| CN102862361B (en) | Fruit and vegetable freshness retaining packaging material capable of releasing 1-methyl cyclopropene and preparation method thereof | |
| Yang et al. | Design and application of a passive modified atmosphere packaging for maintaining the freshness of Chinese cabbage | |
| Zhuang et al. | Modified atmosphere packaging for fresh fruits and vegetables | |
| CN101416655A (en) | High carbon dioxide activity preserving package and use thereof in vegetable and fruit preservation | |
| CN103144845B (en) | The special paper-plastic composite film of fruit and vegetable normal-temperature fresh-keeping | |
| CN108402174A (en) | A kind of garlic fresh-keeping film-coating agent and preparation method thereof | |
| CN101228892A (en) | Combined mushroom fresh-keeping method of paint film, ozone pretreatment and microporous film modified atmosphere packaging | |
| CN1162309C (en) | Dynamic air conditioning fruit and vegetable fresh-keeping packing bag | |
| JP2549924B2 (en) | Freshness preservation film for fruits and vegetables | |
| CN107487535A (en) | Function integrates fresh-keeping packaging bag and the application in intensive shadow on lung is fresh-keeping | |
| CN107788106A (en) | A kind of nonwoven fabric base composite fresh-keeping material and preparation method thereof | |
| CN201124987Y (en) | High carbon dioxide active freshness retaining package | |
| CN105150510B (en) | A kind of Wholly-degradable pla-pcl film and its production method and its purposes | |
| CN104365835A (en) | Preparation of methyl dihydrojasmonate-soy protein isolate composite fresh-keeping membrane and method for keeping south grape fresh | |
| CN107856982B (en) | Chinese chive fresh-keeping packaging film | |
| CN101385481B (en) | Lichee fresh-keeping process | |
| CN111548590B (en) | Preparation method of modified polyvinyl alcohol preservative film and modified polyvinyl alcohol preservative film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171219 |
|
| RJ01 | Rejection of invention patent application after publication |